Shawn and mark want to save $225.00 together . Shawn has $16.00 and saves $10.00 each week . Mark has $22.00 and saves $7.00 each week . Which equation can be used to find the number of weeks it will take them ?
A. 26x + 29x = 225
B. 38x + 17 = 225
C. 55x = 225
D. 38 + 17x = 225